抛物线y=﹣2x2经过平移到y=﹣2x2﹣4x﹣5,平移方法是( ) A.向左平

题型:选择题

问题:

抛物线y=﹣2x2经过平移到y=﹣2x2﹣4x﹣5,平移方法是(  )

A.向左平移1个单位,再向上平移3各单位

B.向左平移1个单位,再向下平移3个单位

C.向右平移1个单位,再向上平移3个单位

D.向右平移1个单位,再向下平移3个单位

考点:二次函数的定义二次函数的图像二次函数的最大值和最小值求二次函数的解析式及二次函数的应用
题型:选择题

老年女性,滑倒后致右手腕关节肿胀、疼痛,功能障碍。

如有尺神经损伤,以下哪种检查能较早期发现该患者的尺神经再生

A.X线

B.MRI

C.肌电图

D.肌力检查

E.感觉评定体感诱发电位

题型:选择题

张女士在第一次小组活动开始时显得焦虑不安,拘谨地审视周围,不与人交流。此时社会工作者应该()。

A.转介张女士给其他社会工作者进行个别辅导

B.评估张女士是否适合参加本小组

C.邀请张女士和其他成员一起进行自我介绍

D.不予关注

题型:选择题

患者,女性,69岁,2小时前晚餐后突感胸骨后剧烈压榨样疼痛,伴大汗、呕吐及濒死感,急诊入院。查心率130次/分,律不齐;血压165/100mmHg,心电图示V1~V5导联ST段呈弓背向上抬高,TNI:3.5ng/ml。

该患者一旦出现需立即消除的心律失常是()

A.心房扑动

B.室上性心动过速

C.室性心动过速

D.窦性心动过速

E.二度Ⅰ型房室传导阻滞

题型:选择题

燃气的相对密度是指()

A.燃气密度与氧气密度的比值

B.燃气密度与空气密度的比值

C.燃气密度与二氧化碳密度的比值

D.燃气密度与氢气密度的比值

题型:选择题

Who is poor in America This is a hard question to answer. Despite poverty’s messiness, we’ve measured progress against it by a single statistic: the federal poverty line. In 2008, the poverty threshold was $ 21,834 for a four-member family with two children under 18. By 1his measure, we haven’t made much progress. Except for recessions, when the poverty rate can rise to 15 percent, it’s stayed in a narrow range for decades. In 2007—the peak of the last business cycle—the poverty rate was 12.5 percent; one out of eight Americans was "poor. " In 1969, another business-cycle peak, the poverty rate was 12.1 percent. But the apparent lack of progress is misleading for two reasons.

First, it ignores immigration. Many immigrants are poor and low skilled. They add to the poor. From 1989 to 2007, about three quarters of the increase in the poverty population occurred among Hispanics—mostly immigrants, their children, and grandchildren. The poverty rate for blacks fell during this period, though it was still much too high (24.5 percent in 2007). Poverty "experts" don’t dwell on immigration, because it implies that more restrictive policies might reduce U.S. poverty.

Second, the poor’s material well-being has improved. The official poverty measure obscures this by counting only pretax cash income and ignoring other sources of support. These include the earned-income tax credit (a rebate to low-income workers), food stamps, health insurance (Medicaid), and housing subsidies. Although many poor live hand to mouth, they’ve participated in rising living standards. In 2005, 91 percent had microwaves, 79 percent air-conditioning, and 48 percent cell phones.

The existing poverty line could be improved by adding some income sources and subtracting some expenses (example: child care). Unfortunately, the administration’s proposal for a "supplemental poverty measure" in 2011—to complement, not replace, the existing poverty line—goes beyond that. The new poverty number would compound public confusion. It also raises questions about whether the statistic is tailored to favor a political agenda.

The "supplemental measure" ties the poverty threshold to what the poorest third of Americans spend on food, housing, clothing, and utilities. The actual threshold not yet calculated—will probably be higher than today’s poverty line. Moreover, this definition has strange consequences. Suppose that all Americans doubled their income tomorrow, and suppose that their spending on food, clothing, housing, and utilities also doubled. That would seem to signify less poverty—but not by the new poverty measure. It wouldn’t decline, because the poverty threshold would go up as spending went up. Many Americans would find this weird., people get richer, but "poverty" stays stuck.

What produces this outcome is a different view of poverty. The present concept is an absolute one: the poverty threshold reflects the amount estimated to meet basic needs. By contrast, the new measure embraces a relative notion of poverty: people are automatically poor if they’re a given distance from the top, even if their incomes are increasing.

What is the author’s attitude towards the new measure()

A. Negative

B. Positive

C. Objective

D. Matter-of-fact

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